Grade 5 Science Practice Test: Earth's Water and Protecting Natural Resources
- Earth's Water and Natural Resources
- 10 questions
- 13 minutes
Ten questions on how Earth's water is distributed and how people can protect water, soil and other resources. Tip: remember that most fresh water is frozen, not in rivers and lakes.
Tap an option to mark your answer. You can change your mind, or tap the same option again to leave the question blank. The correct answers and explanations appear when you finish the test.Tap an option to answer; tap it again to leave the question blank.
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Question 1
Where is most of Earth's water found?
Correct answer: D
About 97% of Earth's water is salty ocean water. Glaciers hold most of the fresh water, but that is only a small share of all water.
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Question 2
About how much of all the water on Earth is fresh water?
Correct answer: A
Only around 3% of Earth's water is fresh. The 97% figure is the salt water in the oceans.
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Question 3
Where is most of Earth's fresh water stored?
Correct answer: B
Roughly two thirds of Earth's fresh water is frozen in ice caps and glaciers. Lakes and rivers hold only a tiny fraction.
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Question 4
Water vapor high in the sky cools and forms tiny droplets that make up clouds. What is this process called?
Correct answer: C
Condensation is the change from water vapor to liquid water when it cools. Evaporation is the opposite change, from liquid to vapor.
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Question 5
Rainwater that soaks into the ground and collects in spaces between rocks and soil is called what?
Correct answer: C
Water that seeps into the ground and fills spaces underground is groundwater; wells pump it up. Runoff is water that flows over the surface instead of soaking in.
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Question 6
Which action at home saves the most fresh water over time?
Correct answer: B
A drip that never stops wastes water every hour of every day. Watering at noon, long showers and half-empty loads all use more water, not less.
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Question 7
Rain washes extra fertilizer from farm fields into a lake. What is a likely result?
Correct answer: A
Fertilizer feeds algae, which can spread quickly. When the algae die, decomposers break them down and use up the oxygen in the water, which can kill fish.
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Question 8
Which energy resource is renewable?
Correct answer: D
Wind is renewed by the Sun's uneven heating of the air and will not run out. Coal, oil and natural gas take millions of years to form.
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Question 9
A town plants trees and bushes along the banks of a river. How does this mainly help the river?
Correct answer: A
Plant roots hold soil together, which reduces erosion and keeps mud out of the river. The other choices describe effects plants do not have.
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Question 10
A class wants to reduce the amount of trash its school sends to the landfill. Which plan does the most?
Correct answer: D
Reusing a bottle means far fewer bottles are thrown away. The other plans all increase the amount of waste.
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